var obj = {};
Object.defineProperties(obj, {
	'property1': {
		value: true,
		//enumerable: true,
		writable: true,
	},
	'property2': {
		value: 'Hello,word',
		//enumerable: true,
		writable: false
	}
});
// 获得单个描述
console.log(Object.getOwnPropertyDescriptor(obj, 'property1'))
